Mmm maybe Avengers 3 could end up with the a re-imagined Masters of Evil

Loki, Mandarin, Abomination, Red Skull, Justin Hammer and maybe someone else...
But it becomes more like a international war zone... With Loki bringing in some aliens, Mandarin and is terrorist associations, Red Skull and newly reformed Hydra and Justin Hammers tech, going into war with the Avengers and the world